Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
SALES AND OPERATING REVENUES:
Coal sales		$ 45,879	$ 61,932
Other revenues		816	551
Total revenues		46,695	62,483
EXPENSES:
Operating expenses		34,009	48,469
Depreciation, depletion and amortization		10,307	10,627
Asset retirement obligations accretion		363	333
Exploration costs		58	253
General and administrative		2,821	2,978
Total operating expenses		47,558	62,660
LOSS FROM OPERATIONS		(863)	(177)
Interest expense	[1]	(1,898)	(5,714)
Equity method investment income		0	55
LOSS BEFORE INCOME TAXES		(2,761)	(5,836)
Current		0	(524)
Deferred		(1,729)	(1,652)
Total income tax benefit		(1,729)	(2,176)
NET LOSS		$ (1,032)	$ (3,660)
LOSS PER SHARE:
Basic and diluted (in dollars per share)		$ (0.03)	$ (0.12)
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic and diluted (in shares)		30,611	30,420
(1) Bank interest		$ 2,135	$ 2,654
Non-cash interest:
Change in fair value of interest rate swaps valuation		(848)	2,593
Amortization of debt issuance costs		611	467
Total non-cash interest		(237)	3,060
Total interest	[1]	$ 1,898	$ 5,714

[1] Bank interest